Clamp for a lamp



Dec. 26, 1939.` l.. wElNREB CLAMP Fon L@ LMP Filed' May s, 1938 @Hmzw/W Patented Dec. 26C, 1939 f 'Il C 291 'sies UNITED ySTATES ie CLAMP FOR. A LAMP Louis Weinreb, Chicago, Ill.

Application May 3, 1938, Serial No. 205,769

2 Claims. (Cl. 24--263) This invention relates to a clamp for attaching or other similar article of furniture is designated an article like a lamp to an article of furniture, by the numeral 9 to-which is attached my invensuch as a chair, a. divan, etc. tion generally designated by the numeral lil, and

One object of the invention is to furnish a showing the extension of the wire H, terminating 5 permanently attached lamp to a chairor other with a male plug to be attached toa wall recep- 5 similar articlesv of furniture, so that, when the tacle or other source of electrical current supply. chair or article of furniture is moved it will not. By referring to Figure 2 where my'inventon disturb the relative position of the lamp, and that is shown in greater detail, l2 designates a stanwill maintain the relationship of the lamp as set, dard form of universal socket joint which is cusll placed', or attached to the article of furniture. tomarili7 SmllOyBd 11 electrical Work OI" attaChl0 Another and main robject of the invention is ing lamps or other similar devices, ll designating the provision of an automatic telescopic clamp the socket generally employed for receiving an which will permit of its beinguniversally atelectric bulb. tachable to the back of an article of furniture The universal joint l2 is attached to a piece of 1li'l like a chair or other similar article of furniture, 'tubing designated by i3 which is curved in a suitand being adapted so that when the article of able fashion as shown at Figure 2 and which furniture is moved about vthe lamp relationship terminates at its other end in a .threaded p0rwill not be disturbed, nor the lamp position intertion to lit the thread l5 of a ball member lli, the fered with. said end has above it a hexagonal section desig- Another object is the provision of a unique nated by 39 used ior tightening 'up to the ball 20 clamping means to --take different widths of the member it to which it is assembled. backs of articles of furniture as heretofore men- The ball lli provides the universal joint in cotioned, operation with the other parts designated for this A still further object of the invention is the purpose namely; the knurled nut it and the nut provision of a simple, practical, eilicient article il, the nut Il having an internal thread ig to lt 25 Which is also cheap to manufacture and attach the threaded extension of member et, and ator the purpose hereinafter to be described. tached to the nut l by virtue of thread l1. The foregoing and other objects and advan- These two nuts are recessed that is, nut I6 is tages of the invention will become apparent from recessed in such a manner as to provide universal the following description and the accompanying action to the ball member It, and nut Il is re- 30 drawing, wherein I have shown an embodiment cessed to retain an expansion spring or other C of the invention, and wherein like numerals des.- spring means designated by It, which tends to lgnate like parts.- maintain the position to which it is desirable to Fig. 1 is an isometric View of my invention as set the lamp once it is attached. attached to an article of furniture shown in The lamp bulb socket il is also vprovided with 35 phantom. a similar universal joint l2, so that by using the Fig. 2 is a detailed front view of my invention two universal joints designated at i2 and I4 it partly in cross-section. will be noted that any desired universal position Fig. 3 is a top plan View looking on the line can be readily obtained in order to suit the con- 40 3 3 of Figure 2. venience of the one using this invention in the 40 Fig. 4 is an external view of the universal joint most advantageous manner. shown in Figure 2. i This entire assembly is then attached to a Fig. 5 is a ratchet or serrated adjusting means ytubing member 3E), which extends for a suiiicient which may be used in place of the universal joint length suitable for the purpose needed andwhich shown in Figure 4. terminates in a threaded portion 3i to receive 45 Fig. 6 is a longitudinal cross-sectional view on a square locking nut 32. Before assembling the the line 6 6 of Figure 5. clamping means to this device there is attached Fig. 7 is a front. view of a novel construction of to the tubing member 3U a collar designated by my clamping means arranged to be adapted to 2l and attached by a set screw. It will be noticed articles of furniture that have diverse widths of that the tubing member 30 has a flange 22, and 5 0 backs. provides a suitable means for retaining the clamp- Fig. 8 is a fragmentary iront View portion show- `ing member 23 so that it can rotate within 180 as ing how my invention could be permanently at-r shown more clearly in Figure 7. tached to the back of an article of furniture. This clamping member 23 has one extension 24 By referring to the drawing in Figure 1, a. chair, which is slightly bent and an extension 25 which 55 is also bent as shown at Figure 7, and it will be seen that the extension 24 is longer than the extension 25, in order to accomodate the different widths of backs of articles of furniture. If a wider back is used as an upholstered chair, it would be more advantageous to use the extension 24 of the clamp 23, to attach to the article or, if the article has a narrow back as the one shown and indicated at 9 it will be more advantageous to turn the clamp 180 to the dotted position indicated whereby the bent portion 25 will accommodate more readily a narrow back of an article of furniture.

This clamping means is further attached to a square tubing generally designated by the numeral 26 which has a partly closed top portion or ledge 21 and a hole 28 to suit the diameter of the tubing member 3B. The coil spring 29 is then attached surrounding the tubing member 30 after which the spring is compressed in order to permit the threaded extension 3l of the tube 30 to be assembled with the square nut 32 the nut then being permitted to slip into the square hole 33 of the square tubing 2t. At one surface of the square tubing 26 is attached the other component clamping element designated by 34 which has a bent portion 35 and dulled teeth`36 or prefer-` ably a knuried edge in order to grip the lower rung of an article of furniture or the underneath portion of the back member.

Fig. 3 designates more clearly the teeth 36 and the cross-sectional arrangement of the tubing 26 and the tubing member 30 in relation with the spring 29.

It will be noticed that the electrical connection is made from the socket portion d1 thru the hollow portion of the tubing i3 thru the universal ball joint lil down thru the tubing 3D and out thru to the male plug which is to be plugged into a wall receptacle or other source of electrical current supply.

Instead of using the ball joint ill, one or more ratchet clamping type of joint may be utilized as illustrated in Figures 5 and 6 where the tubing member i3 is threaded into a member designated by 33 which has a serrated surface or saw teeth designated by 42 having also a threaded male eX- tension designated by dil.

The component tive setting of this joint which works and operates only in one plane, is the portion 4l which has a clearance hole 4B in order to receive the threaded male extension lill. It also has a suitable threaded female portion to receive the tubing member 3B the purpose of the nut 31 being readily obvious, that is, namely, once the desired position has been established the nut 3l is used for the purpose of locking that particular setting or position.

In Figure 8 I designate a, simplied means of permanent attachment of my invention to an article of furniture which shows the tubing member i3 being clamped in a bracket -designated by 43, which has 3 holes drilled in it to receive the wood screws 45 which are to be attached to the back oi the chair 9 or other articleof furniture that it may be desirable to attach this invention to, and a set screw member 45 in a boss 44 which is for the purpose of adjusting the tubing i3 and incidently the lamp bulb height, in an upward and downward direction,

I believe. that in showing a number of ways of attaching a source of illumination to a chair,

member for afecting a rela-` either adjustably in an upward or downward direction or in a single plane by virtue of the joint shown in Figure 5, or in a-universally acting arrangement as shown and illustratedin Figure 2 and other corresponding explanatory views, I have made this description completely explicit.

It has been my experience that a device of this type is highly desirable for in order to obtainv lighting effects to equal what I have attempted to do with my invention when one places a iloor lamp behind a chair it is in the way, it does not furnish the light at the proper place, and when one decides to move about or move the article of furniture certain damage may be done by overthrowing the lamp or other source of supply which may be used in the ordinary manner.

With my device I can move about on my chair, move my chair in any position adjust the lamp to focus the illumination at the particular point where I like to have it, and in that way I believe I have illustrated and created a most advantageous device for the purpose outlined.

It is believed to be obvious that I have provided anovel clamping device which is substantially universal in its action, which is simple and inexpensive to manufacture.v

Altho I have illustrated preferred forms of the invention it will be apparent to those in the art that this inventionis not limited to such.

forms, and that I reserve the right to all modifications and alterations which may be made without departing from the spirit of the invention or from the scope of the subjoined claims.

Having thus described my invention what I claim as new and desire to secure by Letters Patent is:

1. In a device of the character described, universal clamping means, comprising, a tubular member of square section open at one end and provided with a shoulder portion at its other end, a circular tube member threaded at one end slidably mounted in said square tube member, a square nut secured to the threaded end of f said circular tube member and slidably iitted Within the said square tube member, spring means intermediately confined between the said square nut member and the shoulder portion of the said square tube member, aclamping member rigidly secured laterally of the open end of said square tube, and an auxiliary clamp member rotatably mounted on the exposed portion of said circular tube member.

2. In a device of the character described, universal clamping means, comprising, a Htubular member of square section open at one end and provided with a shoulder portion at its other end, a circular tube member threaded at one end slidably Ymounted in said square tube member, a square nut secured to the threaded end of said circular tube member and slidably fitted within the said square tube member, spring meansI intermediately confined between the said square nut member and the shoulder portion of the said square tube member, a clamping member rigidly` secured laterally of thev open end of said square tube, and an auxiliary clamp member rotatably mounted on the exposed portion of said circular tube member, the said auxiliary clamp member eccentrically mounted so as to provide a longer and shorter extension adapted to accommodate the back structure of articles of fur-v niture having varied thicknesses.

LOUIS WEINREB. 

